A reversible drill can alter its rotations from a clockwise direction to a counter clockwise direction, a feature that makes it suitable for both drilling and driving.
Cordless tools/machines are suited to a variety of different situations, as you are not limited to only working in places with power sources nearby.
Drills with LED light provide a constant light source.
A drill with a pistol grip handle is usually compact and lightweight, making the tool suitable for a large variety of apps and easy to use.
We consider a lower weight better because lighter devices are more comfortable to carry. A lower weight is also an advantage for home appliances, as it makes transportation easier, and for many other types of products.
The width represents the horizontal dimension of the product. We consider a smaller width better because it assures easy maneuverability.